A historical event that mapped the direction of a famous poet's writing career is the Civil War for Walt Whitman. The conflict deeply affected him, providing a context for his most significant work, "Leaves of Grass." Whitman's experiences as a volunteer nurse fueled his exploration of themes of democracy, humanity, and the interconnectedness of all people. His poetry, influenced by the war's brutality and the hope for healing, became a powerful testament to the American spirit and the quest for unity.